What is the "best" cartridge a Technics 1210...

:) 
Well, actually after I replaced the headshell with Audio Technica MG-10 and Oyade Heashell leads, the sound is really amazing.
Now one thing bothers me.. it's the stock PSU. Isn't it enough just to move the transformer outside?

I'm fine with stock PSU and stock matt on those decks, i just stopped all the mods of 1210mk2 after full rewire, isonoe feets, fluid damper and various top of the line vintage MM cartridges like Technics EPC-205c mk4, 100c mk3, Glanz MF61, Grace F-9F, Grado etc.

If you want to mod PSU then your next step would be a tonearm.

.. and then a new turntable because of the plinth :)   

@chakster Well, I don't think there is anything wrong with the stock PSU or the stock tonearm.

 The problem is MC cartridges are too sensitive, and when it goes to the inner part of the vinyl, it gets some of the electromagnetic field. So I wonder, why not just to move it outside, or try to put something that reduces the field, between the transformer and the cartridge?

Never had any problems with MC on SL1210mk2, my last MC cartridge tested on that deck was Audio-Technica ART2000, i think i even tried Zyx Airy, but at that time i had much better turntable and tonearm. Anyway i have never experienced any noise in whatever part of the record on SL1210mk2 

lordvampire

The problem is MC cartridges are too sensitive ...

Hmmmm, MM carts typically have much greater sensitivity that most MCs, so I'm not sure what caused your problem here.